Electric hair straightener



FIG. 1 is a front, top and left side perspective view of an electric hair straightener showing my new design;

FIG. 2 is a rear, bottom and right side perspective view thereof;

FIG. 3 is a front elevational view thereof;

FIG. 4 is a rear elevational view thereof;

FIG. 5 is a left side elevational view thereof;

FIG. 6 is a right side elevational view thereof;

FIG. 7 is a top plan view thereof; and,

FIG. 8 is a bottom plan view thereof.

The broken lines in the drawings depict portions of the electric hair straightener that form no part of the claimed design. 

CLAIM The ornamental design for an electric hair straightener, as shown and described. 